Jet air idle screw



Oct. 10, v1967 C, G B555 3,346,244

JET AIR IDLE SCREW Filed Sept. 28, 1965 WW i 27 United States Patent O3,346,244 JET AIR IDLE SCREW Cornelius G. Bess, Bangor, Maine (1108 2ndAve., Honolulu, Hawaii 96816) Filed Sept. 28, 1965, Ser. No. 490,861 4Claims. (Cl. 261-41) This invention relates generally to automotivedevices and more speciiically to carburetor idling devices,

The main object of the present invention is to provide an improved typeof air idle carburetor screws having selfcontained means to give morepower to the automobile engine through increased air pressure, and to beused in lieu of the usual carburetor idling screws.

Another object of the present invention is to provide a jet air idlescrew which employs a pair of screws and associated funnel cups forreceiving air to be delivered through the screws into the carburetor ofthe vehicle.

Still another object of the present invention is to provide a pair ofjet air idle screws, each of which has means for passing airtherethrough from the funnel cups into the carburetor and wherein thescrews are adjustable.

Other objects and advantages of the invention will become apparent froma consideration of the following detailed description taken inconnection with the accompanying drawing wherein a satisfactoryembodiment of the invention is shown. However, it is to be understoodthat the invention is not limited to the details disclosed but includesall such variations and modifications as fall within the spirit of theinvention and the scope of the appended claims.

In the drawing:

FIGURE 1 is a fragmentary front perspective view of an automotivevehicle shown employing the present invention.

FIGURE 2 is a side View of a carburetor showing a modified applicationof the invention.

FIGURE 3 is a cross-sectional view through one of the screws of thepresent invention.

FIGURE 4 is a cross-sectional view through a needle that fits within thesleeve illustrated in FIGURE 3.

FIGURE 5 is an end elevational view of the needle.

FIGURE 6 is a cross-sectional view taken on line 6 6 of FIGURE 4.

Referring now to the drawing, in detail, the numeral 10 represents a jetair idle screw invention wherein there are a pair of screw units 11.Each of the screw units .11 is comprised of a sleeve 12 and needle 13,the needle being fitted within the sleeve. The sleeve comprises anelongated tubular member having an external thread 14 at one end forbeing threadedly secured into the side 15 of a carburetor 16. Adjacentthe thread 14 there is an enlarged shoulder 17 which bears against theside 15 of the carburetor, between shoulder 17 and the carburetor islock nut 99. At the opposite end of the sleeve there is an enlarged head18 of circular coniiguration having a knurled cylindrical side 19. Anopening 20 extends through the sleeve and is screw-threaded at anintermediate portion as shown at 21. The opening 20 is flared at the endhaving the knurled head as shown at 22.

The needle comprises an elongated member having a head 23 at one end anda tapered point 24 at the opposite end thereof. The needle is providedwith an external thread 25 along an intermediate portion of the needleand adjacent the head 23. A compression coil spring 26 of relatively fewturns is positioned around the needle body adjacent the head 23. Theneedle is provided with a pair of air passages 27 extendinglongitudinally through a major portion of the needle, the air passagesopening out upon the end wall 28 of the head to permit air to entertherein. The opposite ends of the openings 27 communicate with 3,346,244Patented Oct. 10, 1967 transverse grooves 29 permitting air to pass outof the needle and into the carburetor when the screw unit is securedthereto. One end of a hose 30 is secured to one end of the screw unitand the opposite end of each hose is attached to a funnel cup 31. Thefunnel cup 31 is of generally conical configuration having an opening 32in the end thereof to permit air to enter therewithin.

In FIGURE l a form of the invention is illustrated for use of the deviceduring summertime wherein the funnel cups are located immediately behindthe grill 33 of an automobile 34 for receiving air from ahead as the carmoves forwardly.

Immediately in front of the opening 32 there is a dust shield 35comprised of a frame 36 of circular configuration within which there isa fine wire mesh 37 for purpose of iiltering the air before it entersthe funnel cups and into the carburetor.

In FIGURE 2 a modilied application of the invention is shown forwintertime use.

In wintertime use, the funnel cups 31 are mounted within the air intakehorn 38 of the carburetor 16.

In operative use, air is brought through the funnel cups through thehose then through the screw units into the carburetor where it causesthe gasoline to atomize into a better spray mixture of air and gas atidling and at high speed of the vehicle. The idling screws will thusimprove the mileage to be derived from each gallon of gasoline. It isestimated that the present idling screws will increase between 41/2 to61/2 miles per gallon of gasoline for the average car. It is to beunderstood that the needle is adjustable relative to the sleeve so as toobtain the correct accurate amount of air to be delivered through theidling screws.

What I now claim is:

1. In a carburetor system, the combination of a carburetor, a pair ofjet air idle screws, said jet air idle screws being secured to saidcarburetor and extending into said carburetor idle system, a hosesecured to each end on the outer end of each of said jet air idlescrews, the opposite ends of each of said hoses being secured to afunnel cup for receiving air therewithin to be delivered through saidhose into said jet air idle screws and into said carburetor, each ofsaid jet air idle screws comprising a sleeve element and a needleelement, said needle element being adjustably secured within said sleeveelement for adjusting the quantity of air to be delivered through saidjet air idle screw, said sleeve comprising an elongated tubular memberhaving a central opening extending therethrough, a central portion ofsaid opening being screw threaded, said sleeve having an external threadat one end for securement to said carburetor, an enlarged knurled headat the opposite end and said opening through said sleeve being tiairedat the end adjacent said enlarged head, said needle comprising anelongated member having an enlarged head at one end, an intermediateportion adjacent said head being externally threaded for engagement withsaid threaded opening of said sleeve, a pair of parallel, spaced apartopenings extending longitudinally through said needle head, through amajor portion of said needle and communicating with a pair of transversegrooves near the opposite end of said needle, each of said groovescommunicating with one of said openings in said needle and said centralopening in said sleeve, and the opposite end of said needle having atapered point for adjustable alignment with a constricted portion ofsaid central opening of said sleeve.

2. In a carburetor system the combination as set forth in claim 1wherein, said funnel cup comprises a conical member having an endopening and having a dust cap in front of said opening, said dust capcomprising a frame having a iine wire mesh.

3. In a carburetor system the combination as set forth in claim 2wherein, said funnel cups are located behind 5 the front grill of anautomobile.

References Cited UNITED STATES PATENTS 6/1931 Chestnutt 261-63 Pogue261-4l Shaf 261--41 X Kaddis et al. 261-41 X Schlichting.

Conant et al. 261-41 Kalert 261--41 Phillips 261-41 X HARRY B. THORNTON,Primary Examiner.

6/193() McKinley 260 41 X 10 TIM R. MILES, Examiner.

1. IN A CARBURETOR SYSTEM, THE COMBINATION OF A CARBURETOR, A PAIR OFJET AIR IDLE SCREWS, SAID JET AIR IDLE SCREWS BEING SECURED TO SAIDCARBURETOR AND EXTENDING INTO SAID CARBURETOR IDLE SYSTEM, A HOSESECURED TO EACH END ON THE OUTER END OF EACH OF SAID JET AIR IDLESCREWS, THE OPPOSITE ENDS OF EACH OF SAID HOSES BEING SECURED TO AFUNNEL CUP FOR RECEIVING AIR THEREWITHIN TO BE DELIVERED THROUGH SAIDHOSE INTO SAID JET AIR IDLE SCREWS AND INTO SAID CARBURETOR, EACH OFSAID JET AIR IDLE SCREWS COMPRISING A SLEEVE ELEMENT AND A NEEDLEELEMENT, SAID NEEDLE ELEMENT BEING ADJUSTABLY SECURED WITHIN SAID SLEEVEELEMENT FOR ADJUSTING THE QUANTITY OF AIR TO BE DELIVERED THROUGH SAIDJET AIR IDLE SCREW, SAID SLEEVE COMPRISING AN ELONGATED TUBULAR MEMBERHAVING A CENTRAL OPENING EXTENDING THERETHROUGH, A CENTRAL PORTION OFSAID OPENING BEING SCREW THREADED, SAID SLEEVE HAVING AN EXTERNAL THREADAT ONE END FOR SECUREMENT TO SAID CARBURETOR,